Machine for agitating liquids



(No Mdem R. SMITH & P. DI-LLON.V MAGHINE POR AGITATING LIQUIDS.

Patented Mar. v11, 1890,

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*PETERS Pholo-Umognphor. Wnhingtnn, D. C.

e UNITED STATES PATENT OFFICE.

RICHARD SMITH, OF SHERBROOKE, QUEBEC, CANADA, AND PETER DILLON, OELAVRENCE, MASSACHUSETTS.

MACHINE FOR AGITATING LIQLIJIDS.

SPECIFICATION forming part of Letters Patent No. 423,285, dated March11, 1890.

Application filed September 30, 1889. Serial No. 325,582. (No model.)

To all whom, it may concern: tional elevation. Fig. 2 is a plan of anagi- Be it known that we, RICHARD SMITH, of tator embodying ourinvention. Fig. 3 is a Sherbrooke, county of Sherbrooke, andProvdiametrical section of the saine, showing a ince of Quebec, Canada,and PETER DILLON, slight modification in the form.

5 of Lawrence, in the county of Essex and State In the herewith-annexeddrawings, 2f rep- 55 of Massachusetts, United States of America, resentsan agitator as an entirety located both citizens of the vDominion ot'Canada, within a vat or other liquid-tight receptacle have inventedcertain new and useful Im- 3, in which the stirring or agitating processproveinents in Agitators; and we do hereby or operation is to takeplace. Said agitator Io declare the following to be a full, clear, andis composed of a fixed casing and arotary 6o exact description of theinvention, such as head. The latter is to revolve, preferably, in willenable others skilled in t-he art to which horizontal planes, and tosuch end a vertical it appertains to make and use the same, refshaft 4is provided, which is to be continuerence being had to the accompanyingdrawously revolved by some prime motor. This I5 ings, and to figures ofreference marked shaft is to be properly stepped at 5 in the vat, 65thereon, which form a part of this speciiicaand has securely fastenedupon its lower end tion, the rotary head 6. The latter is to be ad- Thisinvention relates to apparatus for stirjusted to revolve a slightdistance above the ring or mixing liquids or liquid material of bottomof the vat. Said agitator consists of 2o every description. a lowercircular plate or disk 7, preferably 7o The object of our invention isto produce horizontally placed. Upon the upper suran agitator which isof simple construction, face of said disk are disposed metallic bladesand yet one that will create a rapid, contin- 8, obliquely positioned,but set upon their uous, and thorough circulation of the liquids edgesand at right angles to the surface of 2 5 Op liquid material in process.the disk 7. Said blades extend from the cir- 75 This agitator consists,primarily, of a rocumference of the latter inwardly but a short taryhead composed of an imperforate lootdist-ance,while the disk is curvedor rounded vtom or circular disk, upon the upper surface at its junctionwith the shaft to facilitate the of which are fastened a number ofvertical passage of the liquids.

blades obliquely disposed and extending from i Firmly bolted to thebottoni of the vat is 8o the circumference inwardly a short distance.placed a ring or casting 9, the inner diameter The disk is centrallyaffixed upon a shaft to of which is slightly greater than the outer dibecontinuously rotated. The rotary head is alneter of the head. Upon. thisring are cast located within a stationary circular casing or otherwisesecured a series of vertical abutprovided with a series of deiectorslikewise ments or detlectors l0. Said de fiectors are 85 obliquelydisposed, but oppositely of the obliquely positioned and oppositely tothe blades on the head. VSaid head is further blades upon the head.Above said deiiectors partially inclosed by an annular band of a andresting on their uppermost edges is afwidth suflicient to cover both thebladesand fixed a circular band l2, of a width sufficient thedeflectors, being attached to and resting not only to cover thedetlectors, but to eX- 9o on the upper edges of the latter. Thus thetend over and conceal the blades upon the agitator is providedby suchconstruction with head. Thus a portion of the agitator-that a centralfeed or inlet opening upon its upnearest the shaft-is left opened oruncovered, per side and with discharge-orifices upon its and thus thisspace may be varied-as circumcircumference. stances dictate.. 95

Further peculiarities of construction, as Since this agitator 1soperated on the prinwell as the mode of creating a circulation of cipleof the effects produced by rotary movethe liquid material in which saidagitator ment, it will be seen that the upper uncov- Inay be placed,will be hereinafter described. ered portion of the .agitator serves, incon- 5o The drawings represent in Figure l. a nection with the .obliqueblades, as an inlet- 10o i aperture 13, while the covered portion formedby the bottom disk of the head, the blades thereupon, and theoverlapping circular band 12, creates ducts 15, which discharge into thecircular casing by passages between its deiiectors, said passages beingindicated at 16. In the operation of the agitator these stationarydeiiectors serve to co-operate with the revolving blades. Thus thetendency of the liquid particles to travel in horizontal planes isovercome and the liquid'particles directed against the deflectors havetheir motion changed from rotary to straight-line 1novement. As aconsequence the liquid particles ring or mixing liquids or liquidmaterial, conare expelled outwardly and radially from the casing.

In Fig. 3 is shown a slight modification of the shape of the ring orcasting 9 and the circular band 12 in cross-section. Both such elementsare slightly dished or bent upwardly, as indicated. The object of suchform is to induce .an upward oblique movement to the liquid particles inmotion as ishaft, an imperforate disk or bottom secured thereto, aseries of blades positioned edgewise on its upper surface, a circularcasing they'emerge from the stationary casing by Way of thedischarge-apertures 16. In this manner, ifdesired, the efficiency of theagitator can be increased, as it aids in maintaining the circularmovement of the liquids or liquid -material in Vertical planes andprevents such liquid from being expelled directly toward the walls ofthe receptacle or ting composed of a circular ringa series of frommoving in horizontal circular planes.

From the above arrangement it will be readily seen that when theagitator is continuously rotated liquid particles in the vat will atonce be influenced, since owing to the centrifugal action producedthereby said particles will be directed outwardly by the oblique bladesand forcibly expelled through the ducts.l or discharge-aperturesv formedby the bottom 7 of the head, blades 8, and band 12. As such liquidparticles are displaced from theV center, others induced by gravity passinto the upper uncovered portion 13, termed the inlet or feed aperture,and at once have a rotary divergent motion imparted to them, suchmovement being constantly accelerated as they approach the circumferenceof thefrevoluble head. When such particles composing the liquid leavethe head, they are forcibly expelled and directed against the deflectorswith the resultant effect that their circular horizontal movement ischanged to radial movement and with an upward tendency after leaving thecasing, duc to the flow of liquid particles toward the shaft 4. By

such revolution and action of the agitator a continuous stirring ormixing of the liquid or liquid material is created in vertical planes,and as indicated by the arrows inthe drawings. l

In the drawings we have shown the casing with a circular ring restingupon the vat; but

this may be omitted without affecting the operation of the agitator,since the deflectors purpose as the said ring 9.

What we desire to claim is l. The improvements in apparatus forstirsisting of a fixed circular casing with a series 4of blade-likedetlectors, combined with a revoluble head partly inclosed by saidcasing, a

`series of straight obliquely-fixed blades upon said head, and a centralfeed and a circumferjential discharge, substantially as and for pur-`poses described and specified.

2. An agitator composed of a revoluble furnished with upright detlectorsco-operating with said blades, kand a circular band which covers bothdeflectors and blades, substantially as herein stated.

3. A revoluble agitator having a fixed casdeflectors on its uppersurface and a circular band which rests above and extends inwardlytherebeyond, combined with a disk, a central shaft, the bladesoppositely positioned tothe Vdeflectors, a central inlet 13 for verticalfeed. ,and the passages 16 for horizontal outfiow, substantially as setforth.

4. An agitator adapted to be rotated., by a central shaft and providedwith a central inlet 13, connecting with a series of ducts l5, createdby an imperforate bottom disk, a series of blades thereupon, and astationary circular band extendingv over said blades, combined with acircumferential discharge formed by a fixed circular casing, a series ofdeilectors, and a circular band which rests above the latter,substantially as set forth.

In testimony whereof we affix our signatures in presence of twowitnesses. RICHARD SMITH.

PETER DILI.ON.

Witnesses:

' H. E. Lonen,

FRANCIS C. SrANwooD.

can` be bolted directly to the vat-bottom, in =which event the latterwould serve the same

